KEY: S = Estimate does not meet publication standards because of high
sampling variability or poor response quality. - = Zero or Less than half the
unit shown; thus, it has been rounded to zero.

1 Based on 2002 North American Industry
Classification System (NAICS). NAICS
is a hierarchical coding system and certain codes may be nested. For example,
estimates for values and tons summed from NAICS codes 4231 through 4239 equal
the estimates of values and tons for NAICS code 423. 2 Ton-miles estimates are based on estimated distances traveled along a
modeled transportation network.3 Coefficient of Variation.4 "Truck" as a single mode includes shipments that were made by
only private truck, only for-hire truck, or a combination of private truck
and for-hire truck.5 Estimates for pipeline exclude shipments of crude petroleum.

NOTE: Rows are not shown if all cells for that particular row have no
values. For example, specific state by industry by mode rows are not shown in
this table because there are no data for those rows. Value-of-shipment
estimates are reported in current prices. Estimated measures of sampling
variability for each estimate known as coefficients of variation (CV) are
also provided in these tables. More information on sampling error,
confidentiality protection, nonsampling error, sample design, and definitions
may be found at http://www.bts.gov/publications/commodity_flow_survey/.

SOURCE: U.S. Department of Transportation, Research and Innovative
Technology Administration, Bureau of Transportation Statistics and U.S.
Department of Commerce, U.S. Census Bureau, 2007 Economic Census:
Transportation Commodity Flow Survey, December 2009.